Filthy new exhibition explores importance of dirt

In this image released by Wellcome Images Wednesday, March 23, 2011, a garbage mound at Fresh Kills landfill in the Staten Island borough of New York is seen. A major new museum exhibition in London asks visitors to think again about the filthy and the fetid, exploring the role of dirt as enemy and ally in history, art, science and medicine. "Dirt: The Filthy Reality of Everyday Life" at the Wellcome Collection, runs from Thurdsay to Aug, 31. (AP Photo/Wellcome Images, ho) EDITORIAL USE ONLY

In this image released by Wellcome Images Wednesday, March 23, 2011, a garbage mound at Fresh Kills landfill in the Staten Island borough of New York is seen. A major new museum exhibition in London asks visitors to think again about the filthy and the fetid, exploring the role of dirt as enemy and ally in history, art, science and medicine. "Dirt: The Filthy Reality of Everyday Life" at the Wellcome Collection, runs from Thurdsay to Aug, 31. (AP Photo/Wellcome Images, ho) EDITORIAL USE ONLY

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